Thomas Damaseaux 
  
The results presented lead to the following conclusions: 
a. Classification result 
- settlement areas are detected well 
- since settlement areas and layover areas have a similar spectral signature, layover 
areas are wrongly classified as settlement areas 
- linear elements (roads, rivers) occur in the classification often at the edge of a 
forest, meadow or settlement 
- detection of rivers is poor 
- forest, meadow and settlement can otherwise be separated well 
So it has been shown that at least three different classes can be extracted from the dataset with the presented 
classification algorithm. One or two further classes could also be derived with this algorithm. If we assume four 
to five different classes, low- and high-mountain terrain can be described sufficiently well with respect to its 
surface coverage. This provides a useful basic structure for producing topographic maps. It can thus be stated 
that radar remote sensing can provide a description of surface coverage which is neccessary for producing 
topographic maps. 
b. Height accuracy 
The profiles in Figures 17 and 18 compare the ATKIS (O BLVA München) reference DEM to the InSAR 
DEM. Profile 1 run from west to east while profile 2 run from south to north. 
Through the comparison the following matters become obvious: 
- the geomorphological landforms will be observed in both profiles 
- the IISAR DEM sometimes shows more details than the reference (Profilel) 
- in some fields the profiles from the InNSAR DEM differ from the reference. One reason could be a wrong 
estimation of the height of the trees, a too strong/weak filtering of the DEM or unwrapping mistakes. 
The next step in the analysis is to improve the DEM with the already mentioned methods. Further 
characteristic geomorphological parts from the area will then be examined examplary. Finally a statement can 
be made if the landscape form can also be described acurately enough for cartography purposes in respect to the 
extracted contour lines. 
7. Conclusions 
The status of information extraction from InSAR data for map production was shown. The next step is to 
improve the DEM so that the contour lines can be extracted from it. The classification result and the contour 
lines are then checked for their accuracy. The cartographic result then describes the combination of contour 
lines and surface coverage. These will be examined against the criteria of high-mountain cartography on 
different scales. Finally a statement can be made as to which landscape form (low- and high mountain) up to 
which scale can be described cartographically accurately and reasonably with the help of SAR data. In the near 
future the data from two Austrian high-mountain areas, the Silvretta area and an area around Galtür, will be 
prepared and processed with the same algorithm as presented here. 
  
60 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part Bl. Amsterdam 2000. 
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